Paul Lin

Building practical AI for real life at Reeva makes your calls. Loveline preserves your voice. 20 patents. Founder, builder, Boulder CO.

[Paul Lin @PaulAIBuilds]

@el1zalin Love it babe!

[Paul Lin @PaulAIBuilds]

@el1zalin @lydiahallie Super proud of you babe!!!

[Eliza Lin @el1zalin]

@lydiahallie Thanks! Publicly launched https://t.co/dtBTiOS7Am a gratitude journal that texts you 🤍

[Paul Lin @PaulAIBuilds]

Bringing Reeva to life on @instagram has been exciting. Using free tools, I created this in approximately 45 minutes. The process involved @OpenAI ChatGPT Images 2.0, @grok Video, and @capcutapp .

[Paul Lin @PaulAIBuilds]

Reeva called Laithwaite's Wine to cancel my account today.

They wouldn't let her. Policy says only the account holder can verify.

She tried every angle. Email. Phone number. Asking for a supervisor. Staying polite the whole time.

In the end she told them I'd call back myself and said "have a great day."

That's the thing about building real AI. It doesn't always win. But it handles itself.

(transcript in replies)

[Paul Lin @PaulAIBuilds]

2:23am.
I get to design Reeva's identity, one of the coolest parts of my job.
#AI #VoiceAI

[Paul Lin @PaulAIBuilds]

Before Reeva had a name, this was what building looked like.

8 AI sessions running at once. Two laptops. One obsession: can an AI become useful enough to handle real phone calls for people?

15 months later, Reeva can call, wait on hold, search, text, and summarize.

Still building.

#AI #BuildInPublic #VibeCoding #FounderJourney

[Paul Lin @PaulAIBuilds]

Narita Airport, Jan. 18, 2026.

Building Reeva taught me the hard part wasn’t just LLM reasoning.

It was voice turn detection, phone connectivity, latency, interruptions, and making AI feel natural over a real call.

But the biggest challenge is trust.

People don’t trust AI because it demos well.

They trust it when it helps with something real: calling the pharmacy, waiting on hold with insurance, rescheduling an appointment, or helping a caregiver support a parent.

That’s the journey now: turning a technical system into something people trust with real life.

Reeva is live: 720-500-7000

#AI #VoiceAI #AIAgents

[Paul Lin @PaulAIBuilds]

Curious:

What is the one phone call you would hand off first?

[Paul Lin @PaulAIBuilds]

Meet Reeva. She's an AI that makes phone calls for you. Refunds. Cancellations. Appointments. She even searches the web mid-call.

Try her now: 720-500-7000

Closed beta: https://t.co/4o1VBpnerM
#AI #VoiceAI

[Paul Lin @PaulAIBuilds]

That is why Reeva can search for live information while she talks.

The goal is not just a nice voice. The goal is a conversation that stays current, cohesive, and useful in the moment.

[Paul Lin @PaulAIBuilds]

Staying Safe in the Wake of Wildfires: Lessons from the Marshall Fire
https://t.co/WQihjnzJSl via @LinkedIn

#PalisadesFire #EatonFire #HurstFire #SunsetFire #WildfireSafety #AirQuality #WaterSafety #EmergencyPreparedness #CommunityResilience

[Paul Lin @PaulAIBuilds]

Check out my article: The Future of Deepfake Scams: A Growing Threat in the Digital Age https://t.co/V9CUXTd0b4 via @LinkedIn

[Paul Lin @PaulAIBuilds]

Hey @KirkYuhnke! Good running into you as well. Hope you had time to recover! Love to catch up, will hit you up.

[Paul Lin @PaulAIBuilds]

Thanks @KirkYuhnke @KDVR FOX31 @GoodDayCO for doing a great segment on @Limefuel @kickstarter. http://t.co/JzS33F7YZq #ecstatic

[Paul Lin @PaulAIBuilds]

RT @KirkYuhnke: COMING UP @7:20a on @KDVR Boulder-based @Limefuel has new @kickstarter campaign battery for @GoPro I talk to CEO @paullin_me

[Paul Lin @PaulAIBuilds]

Thx for covering @limefuel @KirkYuhnke! Look forward to the clip, great to meet you in person.